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NITED STATES PATENT OFFIc.

Gr. 7. DOTY, E. A. STEIN, AND W. F. STEIN, OF RAVENNA, OHIO.

PH OTOGRAPH ERS 'DECANTE R.

Specification forming part of Letters Patent No. 48,664, dated'July ll, 186.5.

To all whom it may concern Be it known that we, G. W. DOTY, E. A. STEIN, and W. F. STEIN, of Ravenna, in the county ot' Portage and State of Ohio, have invented certain new and useful Improvements in a-Decanter for Photography, Src.; and we do hereby declare that the following is a full and complete description ot' the construction andoperation ofthe same, reference being had to the accompanying drawing, making a part of this specification.

Theigure represeutsthe decanter, which is made of glass or its equivalent. Near thelower end is a glass faucet, A, provided with a glass stopper, B. To the end of the faucet is connected a rubber tube, O, the other end of which passes through a cork, D, the tube being of such a length that the cork can be placed in the neck of the bottle,as represented in the drawing, or detached from it and an ordinary stopper used.

can readily be dropped, without the waste' resulting from dropping .them in the ordinary way. Y,

A decanter constructed principally for a dropbottle need not have the tube C connected with the faucet, but simply be provided with the faucet and stopper; and when used for treating photographic plates there can be a projection extending out from the decanter, near the lower end, to which the elastic tube can be connected, thereby dispensing with the faucet. By taking out the cork D and turning down the tube C, as'indicated by the dotted lines, the pure solution will run from the decanter through the tube out at the end, and can be distributed over the plate in the most desirable manner, when the tube can be turned up and the cork replaced, the solution running back into the decanter, thus rendering it most convenient in practical use.

In treating the nitrate ot" silver solution as used by photographers the object of the decanter is for holding the solution so as to allow the organic matter to settle to the bottom and decant the solution without disturbing the sediment. Silver solution treated in this manneris purer than can be obtained by anyother process, for in the use of a filter the particles,

being so small, pass through and injure the solution.

Another advantage of using the decanter which so perfectly separates the solution from the organic matter is that it lessens the quantity of acid otherwise required, and consequently gives more intensity to the plate, as is well known to the photographer. In this way, having such a pure solution, the operator is enabled to make all positives and negatives without the least blemish in regard to fogginess, streaks, or spots arising-from particles ot' matter settling on the plate, as is more or less the case in ordinary treatment.

In using the decanter there is great saving of silver, which is quite an object, for itvhas been vproved that in the use of ilters where twenty-four are used in the ordinary manner they will absorb to the amount of one ounce of crystal nitrate of silver, this being entirely saved by the decanter. Oollodion solution used by photographers can be prepared in the same manner, thereby dispensing with the collodion filter.

The solution may be decanted oft' into another vessel,byeither the faucet ortube,with out disturbing the sediment, which may have been precipitated below the orifice for the tube or faucet.

One great advantage of arrangement is the convenience with which the bottle can be closed by cork D, thus preventing both evaporation and dripping at the same time. By the use of the cork a shorter tube may be employed without liability to have the end drop out of the mouth of the bottle. When the cork is employed the tube may be wound around the nec-k of the bottle and the cork caught under the fold of the tube, thereby fastening it up out of the Way, when the bottle can be The above-described decanter, when provided wth the stop-cock, tube, and cork, substantially in the ina-nner and for the purposes set forth.

G. W. DOTY. E. A. STEIN. W. F. STEIN. Witnesses:

M. PARsoN, M. STUART. 

